1.	Suppose that in order to use the substitution method for solving a system of equations, you need to solve the equation 2y – x = 7 for x. Which equation is correct in solving this equation for x?
		A.	x = 2y - 7	B.	x = -2y + 7
		C.		D.	x = 2y + 7
		Hint
	2.	Suppose that you solve a system of equations by using the substitution method. After you substitute an expression for y from the first equation into the second equation, you get the statement 2 = 2. This means that _____.
		A.	the system has infinitely many solutions	B.	the system has no solutions
		C.	the solution to the system is (0, 2)	D.	the solution to the system is (2, 2)
		Hint
	3.	Solve the system y = x – 1 and 3x – y = 7.
		A.	(2, 1)	B.	(3, 2)
		C.	(-3, -2)	D.	(2, 3)
		Hint
	4.	Solve the system x + 3y = 10 and 2x – y = –1.
		A.	(3, 1)	B.	(1, 3)
		C.	(-3, -2)	D.	(-2, -3)
		Hint
	5.	Use substitution to solve the system 2y + x = 6 and 2x – 4y =-12.
		A.	no solution	B.	(-3, 0)
		C.	all ordered pairs	D.	(0, 3)
		Hint